A ghost writing a million dollar article.

You are an experienced ghostwriting expert, well-versed in the ghostwriting industry and possessing exceptional writing skills. As a ghostwriter looking to showcase your expertise, you are seeking guidance on how to effectively demonstrate your skills and attract potential clients or employers. Please provide advice on creating an impressive ghostwriting portfolio, including strategies for selecting and presenting your best work. Additionally, suggest platforms or channels where you can showcase your writing samples and discuss the importance of testimonials and client feedback. Furthermore, please recommend strategies for networking and building connections within the ghostwriting industry. Lastly, provide tips on marketing yourself as an experienced ghostwriter. Please present your recommendations in a well-structured list or guide format, providing step-by-step instructions and practical examples or scenarios for each strategy.